Remove an unnecessary test skipif

Author: dmtucker

tests/test_pytest_mypy.py

@@ -64,10 +64,6 @@ def pyfunc(x: int) -> int:
     PYTEST_VERSION < Version("7.4"),
     reason="https://github.com/pytest-dev/pytest/pull/10935",
 )
-@pytest.mark.skipif(
-    PYTHON_VERSION < Version("3.10"),
-    reason="PEP 597 was added in Python 3.10.",
-)
 @pytest.mark.skipif(
     PYTHON_VERSION >= Version("3.12") and MYPY_VERSION < Version("1.5"),
     reason="https://github.com/python/mypy/pull/15558",